LED Indicator
1 Status Light , 6 line indicators, 8 BLF indicators, 1 voicemail
indicator, 1 headset indicator, 1 mute indicator
Rainbow ET
Expansion Module
44 programmable keys on each Rainbow ET.
1.3、Software
Sip 2.0 (RFC3261) and other related SIP RFCs
6 SIP lines registration
STUN
Jitter Buffer, VAD,CNG
G711A/u, G722, G726-16, G726-24, G726-32, G726-40, G729, Lin16-16, iLBC
Echo Cancellation
SIP Domain name, Authentication and Backup SIP Server
DTMF(Inband, RFC2833, SIP INFO)
Call transfer, Call forward, 3-way conference, Call hold, Call back
DND(Do Not Disturb), Auto answer, Blacklists, Block Call-ID, Block Anonymous call, Dial
plan, IP call